Window stop



Dec. 15, 1936 H. E. BARNETT WINDOW STOP Filed July 31, 1934 FIG. 3.

INVEN TOR ATTORNEY Patented Dec. 15, 1936 UNITED ETATES PATENT OFFICE WINDOW STOP Henry E. Barnett, Summit, Miss.

Application July 31, 1934, Serial No. 737,818

1 Claim.

The invention relates to window stops and locks and particularly to a combined window stop and lock, which may be manufactured at extremely low cost and installed on ordinary sliding sash windows without requiring cutting or fitting of parts of the sash or frame, but merely the driving of a simple fastening such as a screw or nail.

It is a further object to present such a device applicable to the combined use and which may be manipulated by inexperienced persons with ease and certainty for supporting or to prevent raising of windows. It is also a purpose to present such a device which may be utilized to permit partial opening of a window and lock it against further opening, or to lock a window in closed position, and which is also applicable to use to support the window at any desired elevated positions.

Another object is to present such a device which will mar the finish on a sash in a minimum degree and which will be inconspicuous and free from liability of damage to draperies, shades, etc. Also, it is an aim to enable the operation of the device manually with a minimum liability of injury to the hands ofthe operator.

An important advantage of the invention is that when set to look a window against opening, or when utilized to lock the window against further opening beyond a limited open position, the device can not be caused to release or fail to function by jarring or vibration of the sash, nor can it be reached by ordinary wire or other instruments for manipulation or movement to inoperative position.

Additional objects, advantages, and features of invention reside in the construction, arrangement and combination of parts involved in the embodiment of the invention as may be understood from the following description and the accompanying drawing, wherein Figure 1 is a detail side elevation of my locking device, shown freely pivoted and in equilibrium, the upper edge of a sash being shown as raised thereagainst.

Figure 2 is a section of the device on a window frame.

Figure 3 is a fragmentary elevation of the inner side of a window frame showing the sash in vertical section, whereon my invention is embodied, the sash being held partly open.

There is illustrated a wooden window frame I0 of standard construction, having the lower sash ll slidable in the side channel l2 thereof. As is general in such frames, the front side of the channel for the lower sash is formed by a removable bead strip I3, secured to the side memberZl of the frame. My invention is also applicable to metal window frames, as will be understood from the present disclosure.

The sash H may be counter-balanced by sash weights (not shown) in the familiar way, or it may be without counter weights as is the case in many windows. In either case, my invention serves to stop and hold the window securely in any stage of raising movement and to prevent rattling thereof, and also will securely lock the window against being raised from closed position or may be utilized. to lock the window against opening beyond a predetermined open position.

The essential invention consists of a. single small thick fiat plate or cam member I4 adapted to be cast, stamped, out or forged from metal or other suitable material. is cast from Babbitt metal or of metal of like quality, although it may be formed in brass, iron, or aluminum, or may be madev of materials such as Masonite, Bakelite, or other plastic materials, or may be cut from other classes of materials of suitable quality.

The body of the member includes a pivot eye portion l5 adapted to receive loosely a mounting pin or screw 23 which is so formed as to adapt it to be screwed or driven into the side face of the bead l3 at whatever point it may be. required. The eye opening It has been made of an inch in diameter, and the pin 16 has been made of simple steel /8 inch diameter for ordinary do-= mestic window sash.

Integral with the eye portion l5 there is a weight lobe l1 extending over a radius of ap-- proximately 110 degrees. Its peripheral boundary is approximately concentric with the eye and at one terminus it has a. radial end face l8. At the other end it is continued in a cam lobe IQ of longer radius than the weight lobe, with a rounded peripheral notch at the junction. The proximal part of the lobe l9 begins on a radius spaced 15 degrees from the terminus of the lobe I 1-that is, the notch has a circumferential width of about 15 degrees. The cam lobe l9 extends overa radius of 100 degrees, more or less, its periphery constituting a cam face, the middle portion of which has a radial measurement from the eye substantially greater than the distance between the pin 23 and the sash, with parts diminishing in radius in opposite directions continuing from the part of maximum radius. On account of the normal operative positions of the cam and the natural balancing positions of the device when free on a pin inserted horizontally through the eye I6, the notched part of the de- Preferably, however, it I vice may be termed the lower side, and the end N3 of the lobe I! the upper or outer side of the article that is, the side distant from the sash when in operative position. The upper side of the cam lobe is deeply recessed as at 2| to lighten the cam lobe, and forming an extended bill 22 at the upper part of the cam, so that in balancing on a pin through the eye, the device will assume the position shown in Figure 1, where the upper end of the bill is nearly or quite on a level with the end [8 of the lobe l1 and the notch 20 is just beyond a vertical line from the eye IS on the side next the cam lobe I9. In practice, the device for ordinary installation has been made in a size where the lobe H has a radius of of an inch from the eye opening l6, and the cam has a maximum radius of not more than one inch from the eye 16, although these proportions may be varied as discretion indicates, and especially in case of use for supporting extremely heavy elements. Thus, this device in a larger size may be used as a safety device for elevators, to prevent unauthorized use thereof, and to prevent untimely movement thereof at any stages on the path.

In the use of this device, a pin or screw 23 is driven into the bead at a distance from the front face of the sash slightly less than the radius of the lobe l1 and at any point near the upper end of the sash when lowered. It is preferable that the screw have a small head that will pass through the eye 3, so that the cam device may be put in place and removed over the end of the screw while the sash is lowered or raised. Another pin or screw 24 is similarly driven into the bead 13 above the sash, but nearer the path of the sash, so that when the cam 14 is set on this pin, with the cam lobe I 9 next the sash and free to balance on the pin, the notch 20 will be in line with the adjacent plane or inner face of the sash, as at 27 (Fig. 3), and so that when the cam is swung on the pin the medial peripheral face of the cam will strike the upper front edge of the sash, as at 28. Another pin may be located one or two more inches further above in a similar relation to the path of the sash, if desired.

To prevent the sash from being raised the cam device is placed on the pin 23 with the cam lobe I 9 turned downwardly so as to clear the sash, and when released the weight lobe IE] will by gravity overbalance the cam and cause it to swing toward the sash and upwardly until it wedges thereagainst, as at 26. If the device is to be used to hold the sash in raised position, the cam I4 is rotated to swing the cam lobe I9 downwardly from the last described position, then outwardly and upward and inwardly toward the sash until it falls against the sash above the pin 23, as at 29. It will be understood that as the cam device tends to lie with the bill 22 on a level with the face I8, when the bill is raised above this position it will tend to swing downward and so it is in this manner that it now engages the sash above the pin 23. In consequence, when the sash is raised the cam will wedge thereagainst if it starts to move downward, and so its downward movement is prevented. With the cam device positioned on the pin 24 with the cam in the path of the sash, a slight upward movement of the sash will cause the latter to strike against the outer side of the notch and rotate the cam until the far inner side of the notch isswung against the side of the sash, when its rotation will be stopped, and the sash will be locked against upward movement positively. If it is desired to lock the sash positively at its lowered position, without possibility of any movement whatever, the cam device is rotated on the pin 24 to swing the cam lobe upward and outward from the path of the sash, then down ward, until it falls by gravity against the front upper corner of the sash, when the bill 22 will project a distance over the top edge of the sash, and the cam face will bear against the front upper corner so that the sash is held positively at lowermost position. When the cam device is placed on the pin 25 as on the pin 24, the sash may be raised until it engages the notch 20 as before described, when it will be positively stopped and locked against further upward movement. In this way a window may be adjusted for ventilation yet not leaving sufficient clearance for unauthorized entry of persons, and be positively locked against further opening movement.

When the cam as originally put on the pin is rotated clockwise until the cam lobe l9 strikes against the side of the sash above the pin as at 29, Figure 3, gravity will hold it so, and whenever the sash is raised, the cam will wedge against it if downward movement occurs, and so support the sash. When it is desired not to have the cam device l4 operative, it is removed from the pin 23 and replaced with its opposite face next the bead I3. This positions the weight lobe l1 next the sash, so that it clears the sash and the cam lobe I9 is then projected outwardly away from the sash.

If desired, two of the cam devices 14 may be employed, one on the lower pin 23 adjusted as at 26 to act as a wedge to prevent rattling of the sash, and the other on the pin 24 arranged either as a lock against initial movement of the sash as at 28, or adjusted to act as a look after a short lifting movement, as at 21.

The peripheral face of the cam lobe I9 is finely knurled so that it will readily take hold on sash surfaces, and the soft Babbitt metal of the knurling will yield rather than mar the engaged surfaces. It is to be noted that the medial radius of the cam lobe may be said to project substantially horizontally when the cam I4 is freely pivoted.

I claim:

For use with a window construction comprising a frame, a sash slidable in said frame, and a plurality of pins disposed on said frame adjacent said sash, one of said pins being disposed above the normal closed position of the sash and another therebelow,.the former pin being closer to the path of movement of the sash than the latter pin: a fastener and holder comprising a fiat body apertured to receive said pins alternatively therethrough for free pivotal movement of the fastener thereon close beside the frame at right angles to the sash, said body having a weight lobe and a cam lobe both in the plane of the body, the cam lobe having a peripheral cam face with a medial part of predetermined maximum radius greater than the distance of the said latter pin from the sash and parts of diminishing radius extending in opposite directions from said part of maximum radius, the weight lobe being of smaller radius than the cam face and having its center of mass spaced from the cam lobe a substantial distance such that when the fastener is in equilibrium on the pin the cam lobe will tend to lie with said part of maximum radius nearly at the level of the pin, said body having a peripheral notch at the lower side between the weight lobe and the cam lobe to receive the angular horizontal upper edge of a sash and having a predetermined minimum radius less than the distance from the uppermost pin named to the path of the sash; whereby, when said body is disposed upon said uppermost pin it will be in position to receive the upper edge of the sash in said notch when the sash is moved upwardly and when disposed on the said second named pin the weight will cause one of said parts of diminishing radius to bear against the sash and wedge against the sash under movement of the sash in one direction, but said body being movable pivotaliy on the pin to a reversed position whereby the weight will cause the other part of diminishing radius to bear against the sash and wedge against the sash under movement of the sash in a direction opposite that last named.

HENRY E. BARNETT. 

